Pullman (Pullmans plural )
1 n-count A Pullman is a type of train or railway carriage which is extremely comfortable and luxurious. You can also refer to a Pullman train or a Pullman carriage.
(BRIT)
2 n-count A Pullman or a Pullman car on a train is a railway car that provides beds for passengers to sleep in.
(AM)
in BRIT, use sleeping car